Called it!

Jay Garrick that went to Earth-1 is a clone. That's why his cells deteriorate. Real Jay is the man in the iron mask
locked by Zoom.

Zoom needed Wells help to steal Barry's speed. This means either he only knows how to steal speed force of speedsters from E2 or he can't at all.

If he can't then this leaves real Jay at his lair having somehow his speed force suppressed or stolen by other means (that don't work on E1 Flash. Perhaps Barry's not the first Flash Wells helped to steal speed from – E2 Jay and Harry are at odds after all)